CLASS V. INSECTA. 193 



Genus 171. OPATRUM. Fahr., Oliv., Lam., Leuch. Silpha. 

 Lin7i. Tenebrio. Geoff., Marsh, 

 Body ova} : wcurillari/ palpi with their last joint obtrigonate : antenna 

 gradually thicker towards their extremities : the last joints trans- 

 verse, compressed. 

 Sp. 1. Opat. sabulosum. (PL Q.fig.S. a. antenna magnified) 

 Opatrum sabulosum. Fahr., Lutr. Silpha sabulosa. Linn. Tenebrio 



sabulosus. Marsh. 

 Inhabits sandy places. 



Genus J 72. TENEBRIO. Linn., Geoff., Be Geer, Fabr., Lutr., 



Leach. 



Thorax behind as broad as the elytra : bodi/ elongate ; antenna scarcely 

 gradually thicker towards their extremities ; the eighth, ninth, and 

 tenth joints transverse ; the last subglobose : mentum somewhat qua- 

 drate ; the upper margin rounded : maxillary palpi with their last 

 joint thick. 



Sp. 1. Ten. Molitur. {PL A. Jig. 1.) 



Inliabits houses ; the larva> in meal and flour ; and is well known un- 

 der the name of meal-worm, 



Fam. XXIX. Diaperid.^. Leach. 



Mandibles bifid at their extremities : head more or less triangular, with- 

 out a contraction behind, at its juncture with the thorax : tarsi with 

 entire joints : antenna not moniliform, their extremities pertbliated 

 or serrated. 



Stxups 1. — Bo,'^(y linear, or nearly so. T/iora.r almost quadrate. Antenna 

 terminated by a cIuIj. Maxilla unguiculated. 



Genus 173. SARROTRIUJVt. Illig., Fabr., Leach. Hispa. Linn., 

 Marsh. Tenebrio. De Geer. Orthocerus. Lutr. 

 Antenna with the last six joints forming a thick, fusiform, downy 



mass. 

 Sp. 1. Sarr. muticum. {PL 2.Jig. 16. a. antenna magnified.) 

 Sarrotrium muticum. Pai/k., Fabr., Leach. Hispa mutica. Linn., Marsh. 



Orthocerus hirticornis. Latr. 

 Inhabits sandy places. In Britain it is rare, or at least very local. It 



has been found in gravel-pits near Norwich by Mr. Joseph Hooker, 



and near Hampstead by Mr. Stephens, in the months of June and 



July. 

 Stirps. 2. — Antennip not xnomMoxm. Boc/j/ oval, or nearly orbicular : 



a little longer than broad. 



a. Antenna not serrated at their extr-emities. 



Genus 1T4. PHALERTA. L<itr., Leach. Tenebrio. Fabr. 

 Anterior tibia elongatc-trigonate : tarsi short : antenna gradually thick- 

 ening towards their extremities, where they are perfoliated : bod;i/ oval , 



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